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188847 Rhipeus (2006 FT9)
Classification: Jupiter Trojan          SPK-ID: 2188847
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

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Orbit Diagram
Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet has stopped working because of a recent Java upgrade, here is a possible workaround.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06334993270331599 1.645e-07  
a 5.181878940972628 3.6777e-07 au
q 4.853607258785281 1.12e-06 au
i 7.101394489949483 1.466e-05 deg
node 232.8866739384836 8.216e-05 deg
peri 264.9695655782361 0.00015014 deg
M 331.598386584588 0.00013042 deg
tp 2457940.414610395856
0.0015755 JED
period 4308.531982063568
n .08355514163494229 8.8951e-09 deg/d
Q 5.510150623159975 3.9106e-07 au
  Orbit Determination Parameters
   # obs. used (total)      133  
   data-arc span      4441 days (12.16 yr)  
   first obs. used      2003-11-29  
   last obs. used      2016-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54218  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-26 09:16:00  

Additional Information
 Earth MOID = 3.87534 au 
 Jupiter MOID = .0578838 au 
 T_jup = 2.981 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.8 mag n/a MPO367196  

188847 Rhipeus           Discovered 2006 Mar. 23 by Calvin College at the Calvin-Rehoboth Observatory.
According to Virgil, Rhipeus died fighting alongside Aeneas in the fall of Troy. The poet says that Rhipeus was "the single most just man among the Trojans and the best preserver of fairness, but the gods thought otherwise". In the Paradiso, Dante places him in the sphere of Jupiter in the eye of the eagle.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20080819/MPCPages.arcLast Updated: 2008-08-25
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
FirstGov 2016-May-06 09:16 UT
(server date/time)  
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